Reversing mechanism.



E. S. BRYANT & E. GEDERSTROM.

BEVERSING MECHANISM.

APPLICATION FILED MAR- 15, 1909.

992,157; K1 Patented May16, 1911.

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WITNESSES: IN YEN TORS I ELL w X/aMm. E S oRTHSBBJANT B. S. BRYANT & E.OEDERSTROM.

REVEBSIN G MECHANISM.

APPLICATION rILnn MAR. 15, 1909.

Patented May 16, 1911.

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E. S. BRYANT & E. CEDERSTROM.

REVERSING MECHANISM. APPLICATION mum MAR.16,1909.

Pate nted ma 16, 1911.

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n THSBRYANT 5mm CEDE'RS 69 44 INVENTORS ELLSWO A TTORNEYS ELLSWORTH S.BRYANT AND EMIL CEDERSTROM, F DETROIT, MICHIGAN.

REVERSING MECHANISM.

Specification of Letters Patent.

Application filed March 15, 1909.

Patented May 16, 1911. Serial No. 483,442.

To all whom it may concern:

Be it known that we, ELLSWORTII S. BRY- ANT and EMIL GEDnRsrnoM,citizens of the United States of America, residing at Detroit, in thecounty of lNayne and State of Michigan, have invented certain new anduseful Improvements in Reversing Mechanism, of which the following is aspecification, reference being bad therein to the accompanying drawings.

This invention relates to a reversing mechanism and more especially tocertain features thereof whereby any end thrust is balanced, therebyrelieving the moving parts of unnecessary friction and reducing theliability of disarrangement common to devices of this class.

The invention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

In the drawings, Figure 1 is a plan view partially broken away, and insection, of a mechanism embodying features of the invention. Fig. 2 is aView in section on line wm of Fig. 1, on the oblique plane indi cated inFig. 3. Fig. 3 is a view in section on line g c of Fig. 1. Fig. 4 is aview in section on or about line z-2 of Fig. 1. Fig. 5 is a view indetail of a positive lock and release apparatus.

Referring to the drawings, a base 1, suitably designed for strength andlightness, has a main bearing 2 in which a driving shaft 3 is journaled,a collar 4 with side friction bearings 5 preventing endwisedisplacement. A reduced end 6 of the driving shaft is rotatable in therecessed extremity of a follower shaft 7 concentric'in a second bearing8, a bushing 9 being interposed, if desired, between the shafts. Arotatable planetary gear case 10 has a hollow boss 01' hub 11 journaledin the bearing 8 concentric with the follower shaft 7, a suitable flange12 retaining it in place. The other head 13 of the casing is looselyjournaled on the driving shaft 3. A gear 14 formed or keyed on thefollower shaft within the casing meshes with two or more planetarypinions 15 on studs 16 which in turn engage reducing pinions 17 onshafts 19 in the casing, the latter engaging a main gear 20 fast on theend of the main shaft 3. A cylindrical extension 21 is screw-threaded orotherwise secured on a deep flange 22 of the casing and acts as aretainer or keeper for a bushing 23. The latter has outer screw-threads24: of coarse pitch in engagement with a friction drum cone 25 whosebeveled face is adapted to frictionally engage the inner face of thecasing flange 22 when the parts are forced together. A barrel 26 keyedon the driving shaft 3, acts as a bearing for the friction drum which isnon-rotatably reciprocable thereon and is also an inner stop againstwhich the bushing 23 bears.

Spirally disposed ways 27 on the inner periphery of the bushing engagelugs 28 on a sleeve 29 that is longitudinally reciprocated on the shaft3 by a yoke 30 forming the lower end of a shifting lever 31 rocking on across-shaft 32 in bearings 33 of the main frame. This movement of thissleeve rotates the bushing in relation to the drum 25 and thereby forcesthem together or apart through the agency of the screw-threads, theouter thrust of the bushing being taken up by the casing extension 21 inopposition to the thrust of the drum 25 against the casing flange 22,thus balancing the pressure and not transmitting it to any fixed endthrust bearing on theshafts themselves. The same movement of the lever31 that draws the drum 25 away from the casing flange 22 if continuedsufliciently operates through a link 34, arm 35 and right and left screwbolt 36 to draw a clamping band 37 taut around the extension 21, andthereby prevent its rotation.

The operation of the device so far as clescribed is that of theconventional type of planetary change gearing, in that release of thecasing by both band and drum gives low speed forward movement to thefollower shaft, locking the casing by the brake band reverses thefollower shaft rotation, and engagement of the casing by the drum givesdirect high speed forward rotation, with the addition of the novelfeatures of the counterbalancing of the end thrust. In order topositively lock the shafts to rotate in unison and to prevent possibleslippage in high speed work such as automobile and motor boat racing, aplurality of spring-pressed plungers 38 in the inner head of the casing10 proximate the drum 25, are adapted to enter sockets 39 in the latterif their springs 40 are allowed to project them. In ordinary use, theyare held retracted from the drum by their radially extending heads 41extending through longitudinal slots in the casing into an innerperipheral groove of an annular keeper 42 rotatable and longitudinallyreciprocable on the casing 10. The keeper is normally locked againstlongitudinal movement by a pair of studs 43 eccentrically set onrotatable latch disks 44 journaled in suitable bearings on the mainframe at diametrically opposite points of the keeper. One of these disksis locked against rotation with keeper and plungers in retractedposition by a trip arm 45 which turns a flattened stud 46 into a lockingnotch 47 in the disk, and holds the latter fast, a spring 48 encirclingthe plunger to which it is secured at one end and at the other to themetal in which the plunger is journaled, and normally keeping the tripin this position. When the trip is rocked so that the flattened studreleases the latch disk, the plungers are free to snap forward into thesockets in the drums, carrying the keeper forward. To withdraw theplungers whenever it is desired to release the drum or reverse themechanism, a pair of slide rods 49 have cams 50 which underrun and liftpins 51 in the latch disks 52 so as to rotate the disks when the rodsare moved by the lever 31 as the latter is shifted from high speed, tolow speed or reverse position. A quadrant 53 and clamping screw 54 areused to lock the lever in the position required.

In operation, the mechanism may be readily thrown into any of thedesired'positions, without excessive end thrust and this is the mainfeature of the invention, the disposition of the parts being such thatSlight effort on the operators part locks the fric tion drum or thecasing brake.

An additional feature is the positive lock provided for high speed work,together with the automatic release which prevents accidental strippingof the gears.

Obviously changes in the details of construction may be made withoutdeparting from the spirit of the invention and we do not care to limitourselves to any particular form or arrangement of parts.

What we claim as our invention is 1. In a reversing mechanism, a driveshaft, a follower shaft in axial alinement therewith, a casing journaledon the shafts, a planetary gear train therein that is adapted tooperatively connect the casing and shafts, a friction drum nonrotatableand longitudinally reciprocable on the drive shaft adapted tofrictionally engage the casing when moved toward one end thereof, abushing rotatably secured in the casing in screwthreaded engagement withthe drum, and a sleeve longitudinally reciprocable on the shaftconcentric with the bushing adapted to rotate the bushing when movedlongitudinally on the shaft.

2. In reversing mechanism, a drive shaft, a follower shaft in axialalinement therewith, a casing journaled on the shafts, a planetary geartrain therein that is adapted gaging spirally disposed ways in the innerperlphery of the bushing.

3. In reversing mechanism, a drive shaft, 7

a follower shaft in axial alinement therewith, a casing ournaled on theshafts, a planetary gear train in the casing that is adapted tooperatively connect the casing and shafts, a friction drum.non-rotatable and longitudinally reciprocable on the drive shaft adaptedto frictionally engage the casing when forced toward one end thereof, abushing rotatably journaled in the other end of the casing inscrew-threaded engagement with the drum, and a longitudinally movablesleeve on the drive shaft concentrically within the bushing providedwith lugs engaging spirally disposed ways in the inner periphery of thebushing.

4. In a reversing mechanism, a drive shaft, a

follower shaft in axial alinement therewith,

a casing journaled on the shafts, a planetary gear train therein that isadapted to operatively connect the casing and shafts, a friction drumnon-rotatable and longitudinally reciprocable on the drive shaft adaptedto frictionally engage the casing when moved toward one end thereof, abushing rotatably secured in the casing in screw-threaded engagementwith the drum, a sleeve longitudinally reciprocable on the shaftconcentrio with the bushing adapted to rotate the bushing when movedlongitudinally on the shaft, and a lever for shifting the sleeve.

5. In a reversing mechanism, a drive shaft, a follower shaft in axialalinement therewith, a casing journaled on the shafts, a planetary geartrain therein that is adapted to operatively connect the casing andshafts, a friction drum non-rotatable and longitudinally reciprocable onthe drive shaft adapted to frictionally engage the casing when movedtoward one end thereof, a bushing rotatably secured in the casing inscrewthreaded engagement with the drum, a sleeve longitudinallyreciprocable on the shaft concentric with the bushing adapted to rotatethe bushing when moved longitudinally on the shaft, means for positivelylocking the drum and casing when frictionally engaged, and means forshifting the sleeve adapted to relase the locking means when the drum isretracted from the casing.

6. In a reversing mechanism, a drive shaft, a follower shaft in axialalinement there with, a casing journaled on the shafts, a

planetary gear train therein that is adapted to operatively connect thecasing and shafts, a friction drum non-rotatable and longitudinallyreciprocable on the drive shaft adapted to frictionally engage thecasing when moved toward one end thereof, a bushing rotatably secured inthe casing in screw-threaded engagement with the drum, a sleevelongitudinally reciprocable on the shaft concentric with the bushingadapted to rotate the bushing when moved longitudinally on the shaft,spring plungers in the casing adapted to enter sockets in the frietiondrum when the latter is engaging the casing, an annular keeperreciprocable on the casing adapted to hold the plunger-s retracted,latch plates adapted to retain the keeper and plungers in retractedposition, a trip arm adapted to lock the parts in retracted position,slide rods adapted to move the latch plates into retracted position, anda lever for shifting the sleeve adapted to move the slide rods intooperative relation with the latch disks when it shifts the sleeve intorelease position.

7. In a reversing mechanism having a drive shaft, a follower shaft, acasing, change speed gearing therein operatively coupling the shafts andeasing, a friction drum adapted to engage the casing, a shifting leveroperatively coupled to the drum and adapted to move it into engagementwith the casing, means for positively locking the drum and casingconsisting of an annular keeper shiftable longitudinally on the casing,a pair of oppositely disposed latch disks adapted to reciprocate thekeeper, a trip adapted to lock the keeper in retracted position,plunger-s in the casing secured by the keeper, springs adapted toproject the plungers into sockets in the drum when the plunger keeper isreleased, slide rods each adapted to rotate a latch disk into retractedposition, and a connection between the shifting lever and slide rodsadapted to move the slide rods into operative relation with the diskswhen the lever is shifted into release position.

8. In a reversing mechanism, a main frame, a drive shaft journaledtherein, a follower shaft journaled therein in axial alinement with thedrive shaft, a casing rotatable on the shafts in the main frame, asleeve longitudinally reciprocable on the drive shaft through one end ofthe casing, a bushing having an end thrust bearing in said casing endwhose inner periphery is provided with spiral ways engaged by lugs onthe sleeve, a friction drum non-rotatable and longitudinallyreciprocable on the drive shaft having screw-threaded engagement withthe bushing, adapted to frictionally engage a flange on the periphery ofthe casing when the drum is projected toward it by rotation of thebushing, and a planetary gear train operatively connecting the casingand shafts.

9. In a reversing mechanism, a main frame, a drive shaft journaledtherein, a follower shaft journaled therein in axial alinement with thedrive shaft, a casing rotatable on the shafts in the main frame, asleeve longitudinally reciprocable on the drive shaft through one end ofthe casing, a bushing having an end thrust bearing in said casing endwhose inner periphery is provided with spiral ways engaged by lugs onthe sleeve, a friction drum non-rotatable and longitudinallyreciprocable on the drive shaft having screw-threatiled engagement withthe bushing, the casing periphery being adapted to frictionally engagethe drum when the latter is projected toward a flange thereon byrotation of the bushing, a planetary gear train operatively connectingthe casing and shafts, m ans for locking the casing from rotating in theframe, and means for shifting the sleeve longitudinally on the shaft.

10. In a reversing mechanism, a main frame, a drive shaft journaledtherein, a follower shaft journaled therein in axial alinemcnt with thedrive shaft, a casing rotatable on the shafts in the main frame, asleeve longitudinally reciprocable on the drive shaft through one end ofthe casing, a bushing having an end thrust bearing in said casing endwhose inner periphery is provided with spiral ways engaged by lugs onthe sleeve, a friction drum non-rotatable and longitudinallyreciprocable on the drive shaft having screw-threaded engagement withthe bushing, the periphery of the casing being adapted to frictionallyengage the drum when the latter is projected toward a flange thereon byrotation of the bushing, a planetary gear train operatively connectingthe casing and shafts, spring-pressed plunger-s in the casing parallelto the shafts, adapted when released to enter sockets in the drum, anannular keeper movable longitudinally of the casing to which theplungers are secured, latch disks rotatable in the casing havingeccentric studs adapted to shift the keeper when the disks are turned, atrip adapted to hold the keeper in retracted position, a slide rod foreach disk having a cam engaging a pin on the disk adapted to turn thedisk into retracted position when the rod is advanced, a lever forshifting the sleeve and links connecting the slide rods and leveradapted to advance the rods when the lever, sleeve and bushingretractthe drum from the flange.

11. In a reversing mechanism, a main frame, a bearing on one endthereof, a drive shaft rotatable in the bearing secured against endwisemovement therein, a follower shaft bearing on the frame axially alinedwith the drive shaft bearing, a gear casing concentric with the shafthaving a hollow boss rotatably secured against endwise movement in thefollower shaft bearing, and a peripheral flange adjacent the drive shaftbearing, a follower shaft journaled in the boss, with one end contactingwith the adjacent end of the drive shaft, a planetary gear trainoperatively connecting the casing and shafts, an extension secured onthe drive shaft bearing, a rotatable bushing having an end thrustbearing in the outer end of the extension and a screwthreaded periphery,a friction drum non-rotatably reci rocable 011 the drive shaft inscrew-threaded engagement with the bushing, adapted to frictionallyengage the flange, a sleeve reciprocable on the drive shaft providedwith lugs engaging spiral ways in the inner periphery of the bushing,and means for shifting the sleeve and for locking the casing againstrotation in the frame.

12. In a reversing mechanism, a main frame, a bearing on one endthereof, a drive shaft rotatable in the bearing secured against endwisemovement therein, a follower shaft bearing on the frame axially alinedwith the drive shaft bearing, a gear casing concentric wit-h the shafthaving a hollow boss rotatably secured-against endwise movement in thefollower shaft bearing, a follower shaft journaled in the boss with oneend contacting with the adjacent end of the drive shaft, a planetarygear train operat-ively connecting the gears and shafts, the casinghaving a peripheral flange on the end adjacent the drive shaft bearing,an extension secured thereon, a rotatable bushing having an end thrustbearing in the outer end of the extension and a screw threadedperiphery,a friction drum non-rotatably reciprocable on the drive shaft inscrewthreaded engagement with the bushing, adapted to frictionallyengage the casing flange, a sleeve reciprocable on the drive shaftprovided'with lugs engaging spiral ways in the inner periphery of thebushing, means for shifting the sleeve and for locking the casingagainst rotation in the frame, and means for positively locking the drumand casing together adapted to be thrown out of gear by the sleeveshifting means when the latter withdraws the drum from contact with theflange.

13. In a reversing mechanism, a driving shaft, a follower shaft in axialalinement therewith, a casing journaled on the shafts, a planetary geartrain adapted to operatively connect the casing and shafts, a frictiondrum non-rotatable and reciprocable on the drive shaft adapted tofrictionally engage the casing when moved toward one end thereof, arotatable bushing in screw-thread ed engagement with the drum having anend thrust bearing against the casing in opposite direction to thethrust of the drum and a member sliding on the drive shaft adapted torotate the bushing when shifted on the shaft. 7 I

In testimony whereof we atfix our signatures in presence of twowitnesses.

ELLSWORTH S. BRYANT. EMIL CEDERSTROM. Witnesses:

C. R. STIOKNEY, O'r'ro F. BARTHEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

